Aim: To investigate the prevalence of the early unitary loss of deciduous and the need for space maintainer in the posterior region, of the band-loop type. Methods: The clinical examination of 568 children between 6 and 12 years of age in mixed dentition was performed in two municipal schools. After the diagnosis of premature loss of one or two deciduous molars (unilateral, one or both arches, respectively), without successors initiating the eruptive process in the oral cavity, the child was referred to the Clinical School of Dentistry of UESPI (CSD ) for installation of the band-handle space maintainer. Results: The prevalence of early molar loss was 4.04%, the etiological factor of which was dental caries for all sample. Only 13 attended the CEO for detailed examination. After radiographic examination, it was verified that 8 did not need space maintainers because they were approximately 2/3 of the permanent successors root formation. In 5 children was placed the maintainer of space, band-handle, who are being supervised every 3 months until the eruption of the permanent successors. Conclusion: The prevalence of early premolar molar loss was 4.04% with no statistical difference between genders. The use of space maintainers after the early loss of a deciduous tooth is a preventive measure of malocclusion, being the band-loop appliance an excellent choice after loss of the deciduous unilateral molar.

Introduction: Neglect with oral health and hygiene will be reflected in the accumulation of biofilm and possible formation of supra and / or subgingival calculus, one of the etiological factors of Piogenic granuloma (PG). Objective: To investigate the prevalence and etiological factors of pyogenic granuloma in pregnant women. Method: The study was carried out on 102 pregnant women attending prenatal care in Family Health Strategies. The oral examination of the gingival tissue of the maxilla and the mandible was performed to evaluate the presence of PG, according to Neville et al classification, gingival bleeding, poorly adapted restorations, supra gingival calculus and residual roots. The chi-square test (χ2) was used to investigate the degree of association between variables. Results: Prevalence of PG was 1.96% (n = 2) in the third semester of pregnancy. No pregnant woman had received information about the condition during prenatal care. Regarding the quality of bucaL hygiene, in 63 pregnant women it was considered unsatisfactory, with plaque visible and supragingival tartar in both arches and satisfactory in 39, with supragingival tartar in the lingual of the antero-inferiors and in the vestibular face of the upper molars associated to plaque visible on all teeth. The chi-square test demonstrated a greater need for scaling and corono-root straightening and removal of residual roots when associated with the pregnancy condition. Conclusions: The prevalence of pyogenic granuloma was 1.9% during the third trimester of gestation. As an etiological factor, the presence of too much dental calculus and visible plaque in both arches was found in 61.7% of the pregnant women.

Aim: To determine the prevalence, etiological factors of white spots on enamel and to evaluate the treatment by microabrasion technique in schoolchildren. Method: A study was developed in children between the ages of 6 and 12 of both genders, enrolled in 3 municipal public schools. Oral examination of the children was carried out, and for those children in whom white spot lesions were found, dental treatment was provided by the microabrasion technique in the incisors and/ or first permanent molars to prevent the evolution to a caries lesion with cavitation, since the enamel structure was damaged. Results: The most affected age was 10 years with 27.8% (n = 5). In relation to the enamel surface area affected by white patches, the majority had 1% - 24% of the enamel reached. The possible etiological factors of white patches were systemic infections, trauma or caries with pulp involvement in a deciduous tooth. The treatment was effective in 16 children and for the remaining two the restorative treatment was performed. Conclusion: The prevalence of white spot lesions found in enamel was 3.95%, with a higher prevalence in females. The permanent right upper central incisor was the most affected. The treatment proved to be effective in most children possibly because the lesion is located more superficially in the enamel.KeywordsDental enamel; Enamel hypoplasia; Tooth demineralization; Enamel microabrasion.